/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.io.gcp.bigquery;



import com.google.api.services.bigquery.model.TableRow;

import com.bff.gaia.unified.sdk.Pipeline;

import com.bff.gaia.unified.sdk.transforms.PTransform;

import com.bff.gaia.unified.sdk.values.*;

import com.bff.gaia.unified.vendor.guava.com.google.common.collect.ImmutableMap;

import com.bff.gaia.unified.sdk.values.PCollection;

import com.bff.gaia.unified.sdk.values.PInput;

import com.bff.gaia.unified.sdk.values.POutput;

import com.bff.gaia.unified.sdk.values.PValue;

import com.bff.gaia.unified.sdk.values.TupleTag;



import java.util.Map;



import static com.bff.gaia.unified.vendor.guava.com.google.common.base.Preconditions.checkArgument;



/** The result of a {@link BigQueryIO.Write} transform. */

public final class WriteResult implements POutput {

  private final Pipeline pipeline;

  private final TupleTag<TableRow> failedInsertsTag;

  private final PCollection<TableRow> failedInserts;

  private final TupleTag<BigQueryInsertError> failedInsertsWithErrTag;

  private final PCollection<BigQueryInsertError> failedInsertsWithErr;



  /** Creates a {@link WriteResult} in the given {@link Pipeline}. */

  static WriteResult in(

	  Pipeline pipeline, TupleTag<TableRow> failedInsertsTag, PCollection<TableRow> failedInserts) {

    return new WriteResult(pipeline, failedInsertsTag, failedInserts, null, null);

  }



  static WriteResult withExtendedErrors(

      Pipeline pipeline,

      TupleTag<BigQueryInsertError> failedInsertsTag,

      PCollection<BigQueryInsertError> failedInserts) {

    return new WriteResult(pipeline, null, null, failedInsertsTag, failedInserts);

  }



  @Override

  public Map<TupleTag<?>, PValue> expand() {

    if (failedInsertsTag != null) {

      return ImmutableMap.of(failedInsertsTag, failedInserts);

    } else {

      return ImmutableMap.of(failedInsertsWithErrTag, failedInsertsWithErr);

    }

  }



  private WriteResult(

      Pipeline pipeline,

      TupleTag<TableRow> failedInsertsTag,

      PCollection<TableRow> failedInserts,

      TupleTag<BigQueryInsertError> failedInsertsWithErrTag,

      PCollection<BigQueryInsertError> failedInsertsWithErr) {

    this.pipeline = pipeline;

    this.failedInsertsTag = failedInsertsTag;

    this.failedInserts = failedInserts;

    this.failedInsertsWithErrTag = failedInsertsWithErrTag;

    this.failedInsertsWithErr = failedInsertsWithErr;

  }



  /**

   * Returns a {@link PCollection} containing the {@link TableRow}s that didn't made it to BQ.

   *

   * <p>Only use this method if you haven't enabled {@link

   * BigQueryIO.Write#withExtendedErrorInfo()}. Otherwise use {@link

   * WriteResult#getFailedInsertsWithErr()}

   */

  public PCollection<TableRow> getFailedInserts() {

    checkArgument(

        failedInsertsTag != null,

        "Cannot use getFailedInserts as this WriteResult uses extended errors"

            + " information. Use getFailedInsertsWithErr instead");

    return failedInserts;

  }



  /**

   * Returns a {@link PCollection} containing the {@link BigQueryInsertError}s with detailed error

   * information.

   *

   * <p>Only use this method if you have enabled {@link BigQueryIO.Write#withExtendedErrorInfo()}. *

   * Otherwise use {@link WriteResult#getFailedInserts()}

   */

  public PCollection<BigQueryInsertError> getFailedInsertsWithErr() {

    checkArgument(

        failedInsertsWithErrTag != null,

        "Cannot use getFailedInsertsWithErr as this WriteResult does not use"

            + " extended errors. Use getFailedInserts instead");

    return failedInsertsWithErr;

  }



  @Override

  public Pipeline getPipeline() {

    return pipeline;

  }



  @Override

  public void finishSpecifyingOutput(

	  String transformName, PInput input, PTransform<?, ?> transform) {}

}